a hemispherical dome of a stupa needs to be painted if the circumference of the base of the dome is 17.6 metre find the cost of painting it given the cost of painting is rupees 5 per cm^2
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You have not mentioned about the unit of the circumference of the base of the dome. So, I have considered it in meters.
Circumference of circle = 2πr
⇒ 17.6 = 2*22/7*r
⇒ 44r = 17.6*7
⇒ r = 123.2/44
⇒ Radius = 2.8 m or 280 cm
Now, Curved surface area of the hemisphere = 2πr²
⇒ = 2*22/7*280*280
⇒ = 3449600/7
⇒ = 492800 sq cm
Cost of painting = Rs. per 100 sq cm
Total cost of painting = (492800*5)/100
Total cost of painting = Rs. 24640
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